Jinero

online.jineroPublished by jinero.onlineOfficial publisherv1.4.0Updated Oct 24, 2026

AI-agent design tools: fonts, font recognition, palettes, color naming, contrast, code, SVG, CSS.

VerifiedStreamable HTTPWeb executableDeveloper Tools Media & Design

Server details

Identifier: online.jinero/jinero
Transport: Streamable HTTP
Runtime: Web executable
Trust: Verified
Published: Sep 16, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified that this server's namespace belongs to jinero.online, which also runs its endpoint. That identifies the publisher; it does not make the server's tools safe.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

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Overview

AI-generated overview

Hosted, read-only design toolbox for AI assistants: font search and recognition, color math and palettes, code/SVG/CSS helpers.

What you can do: Search the free font catalog, fetch family metadata, files, @font-face CSS and download URLs, and identify a font from an image crop
Check WCAG contrast, generate tints and shades, name colors, and extract a dominant palette from an image
Search and read curated color palettes by tone, mood, harmony and tags
Minify or beautify code, detect a snippet's language, convert between text formats, and list available converters
Optimize SVG markup, turn SVG or images into data URIs, and list optimization presets
List and read SCSS mixins, and compute fluid CSS clamp() expressions
When to use it: Useful when an assistant is doing front-end or design work: picking and wiring up fonts, checking color contrast for accessibility, building a palette from a screenshot, or cleaning up SVG and CSS. It saves the assistant from guessing at font names, color values or clamp math.
Requirements: Nothing to install: a remote Streamable HTTP endpoint at jinero.online/mcp, with no authentication, API key or environment variables. Older stdio-only clients need a bridge such as mcp-remote. Network access is required, and the endpoint is rate-limited per IP.

Before you install

Anonymous and free, but rate-limited (60 requests/min per IP, with tighter per-tool caps on font recognition, color extraction and parser tools). Three tools fetch a user-supplied URL, so images or URLs you pass are sent to the service; uploaded images are described as processed in memory and not stored. Code and SVG are sent to a third party for parsing, though the server states they are never executed or stored.

Installation

In SourceWeft

Open Jinero in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/online.jinero%2Fjinero/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "jinero": {
      "type": "http",
      "url": "https://jinero.online/mcp"
    }
  }
}

README

Jinero MCP Server

[jinero-mcp MCP server] [smithery badge]

online.jinero/jinero — a hosted, remote Model Context Protocol server that gives AI agents (Claude, Cursor, Cline, Zed, Gemini CLI…) the design tools of jinero.online: 22 read-only tools for fonts (search, CSS, files, recognition from an image), color math (WCAG contrast, shades, naming, palette extraction), curated palettes, code minify/convert/detect, SVG optimization and SCSS helpers.

Endpoint: https://jinero.online/mcp (Streamable HTTP)
Auth: none — anonymous & free, rate-limited at 60 req/min per IP (plus per-tool caps on heavy tools, see below)
Registry: online.jinero/jinero in the official MCP registry
Manifest: /.well-known/mcp/server.json
Human docs: jinero.online/dev/mcp — full reference with example responses

Connect

Claude Code (CLI):

Claude Desktop / Cursor / Cline (config):

Older stdio-only clients can bridge with npx mcp-remote https://jinero.online/mcp.

Trust & safety

Every tool declares MCP annotations, verifiable in tools/list:

all 22 tools are readOnlyHint: true and idempotentHint: true;
submitted code/SVG is parsed and transformed as text — never executed, never stored;
uploaded images (font recognition, color extraction) are processed in memory and deleted immediately;
only three tools fetch a user-supplied URL (recognize_font, extract_colors, svg_to_datauri) — marked openWorldHint: true, with SSRF-guarded, size-capped fetches.

A note for automated risk scanners: some directories classify minify_code, convert_code, generate_clamp or recognize_font as "write" tools based on their verbs. They are pure functions — text/math in, text out; nothing on the server or the caller's side is modified. The authoritative signal is the readOnlyHint: true annotation each of the 22 tools declares in tools/list (snapshotted in tools.json).

Rate limits

The whole endpoint is capped at 60 requests/min per IP. On top of that, compute-heavy tools enforce their own per-tool per-IP caps (server v1.4.0+), returned as a clean tool error with a retry hint when exceeded — each cap is also stated in the tool's description:

Tool	Cap	Why
`recognize_font`	5/min	CNN model inference
`extract_colors`	10/min	image analysis subprocess
`minify_code`, `convert_code`, `optimize_svg`	30/min	parser subprocesses
`svg_to_datauri`	30/min	may fetch external URLs

Tests & CI

tests/tools.test.mjs exercises every declared tool against the live endpoint (zero dependencies, Node 20+):

CI runs the suite on every push and weekly (workflow), and tools.json is a committed snapshot of the live tools/list — schemas and annotations included (npm run update-snapshot to refresh).

Try it without a client

bash

# List all toolscurl -s -X POST https://jinero.online/mcp \  -H "Content-Type: application/json" \  -H "Accept: application/json, text/event-stream" \  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

# List all toolscurl -s -X POST https://jinero.online/mcp \  -H "Content-Type: application/json" \  -H "Accept: application/json, text/event-stream" \  -d '{"jsonrpc":"2.0","id":1,"method":"tools/list"}'

More runnable examples in examples/.

Tool reference

Generated from the live tools/list of the current server version.

Fonts

`search_fonts`

Search the free font catalog by name, category, style tags, language coverage, variable/monospace flags and style count. Returns a paginated list of families.

read-only · idempotent

Parameter	Type	Description
`name`	string	Fuzzy name match.
`category`	string	Comma-separated categories, e.g. 'serif,sans'.
`langs`	string	Comma-separated language codes, e.g. 'latin,cyrillic' — ALL must be supported.
`style`	string	Comma-separated style tags, e.g. 'handwriting,condensed' — ALL must match. One of: handwriting, script, display, slab, rounded, condensed, expanded, stencil, pixel, blackletter, outline, retro.
`variable`	boolean	Only variable fonts.
`monospace`	boolean	Only monospace fonts.
`styles_min`	integer	Minimum number of styles.
`styles_max`	integer	Maximum number of styles.
`order`	string: likes \| downloads \| views \| name \| created_at	Sort field, default 'likes'.
`sort`	string: asc \| desc	Sort direction.
`per_page`	integer	Results per page (default 24).
`page`	integer	Page number.

`recognize_font`

Identify which font is used in an image. Powered by our OWN CNN embedding model, trained on the jinero font catalog — it matches fonts by visual shape/style, so it needs NO OCR and NO text (works for Latin and Cyrillic). Send a tight crop of one line of text as either image_url (public URL) or image_base64 (base64/data-URI, e.g. a local screenshot). The image is processed in memory and deleted immediately — never stored. Returns the most visually similar font families with scores. Fast (~200 ms).

read-only · idempotent · fetches external URLs

Parameter	Type	Description
`image_url`	string	Public URL of an image — a tight crop of one line of text. Provide either this or image_base64. Recognition is by visual shape (no OCR/text needed); Latin & Cyrillic supported.
`image_base64`	string	Base64-encoded image (raw base64 or a data:image/...;base64 URI), max 8 MB decoded — use this to send a local file/screenshot without hosting it. Provide either this or image_url.
`top_k`	integer	Number of font matches to return (3–20, default 8).

`get_font`

Get full metadata for one font family by slug: styles, weights, axes, license, subsets and download/CSS URLs.

read-only · idempotent

`get_font_files`

List every font file (weight/italic/format + direct woff2/ttf URL) for a family — handy for building custom @font-face rules.

read-only · idempotent

`get_fonts_css`

Generate ready-to-use @font-face CSS for a family spec (Google-Fonts-compatible), e.g. "inter:wght@400,700" or a variable range "inter:[email protected]". Returns CSS text.

read-only · idempotent

Parameter	Type	Description
`family` (required)	string	Family spec, e.g. "inter:wght@400,700" or "inter:[email protected]".
`display`	string: swap \| auto \| block \| fallback \| optional	font-display value (default swap).

`get_font_download_url`

Return the direct ZIP download URL for a font family (all styles + a ready fonts.css). Does NOT download — hand the URL to the user or fetch it separately.

read-only · idempotent

Colors

`check_contrast`

Check the WCAG contrast ratio between a foreground and background color, with AA/AAA pass/fail for normal and large text.

read-only · idempotent

`get_color_shades`

Generate tints and shades for a base color (lighter/darker steps) with hex values.

read-only · idempotent

`name_color`

Get the closest human-readable name for one or more colors. Pass a single hex or several comma-separated (e.g. "#3b82f6,#000,#ff7f50"); returns each input with its nearest color name, the reference hex, an exact-match flag and the perceptual distance.

read-only · idempotent

`extract_colors`

Extract a dominant-color palette from an image. Send either a public image_url or image_base64 (base64/data-URI, e.g. a local screenshot). The image is processed in memory and never stored. Each color comes back with its hex, rgb, hsl, share of the image, and the closest human color name — a named palette in one call.

read-only · idempotent · fetches external URLs

Parameter	Type	Description
`image_url`	string	Public URL of the image to pull the palette from. Provide either this or image_base64.
`image_base64`	string	Base64-encoded image (raw base64 or a data:image/...;base64 URI), max 10 MB decoded — use this to send a local file/screenshot without hosting it. Provide either this or image_url.
`count`	integer	How many colors to return (2–16, default 8).
`mode`	string	Palette mode: "balanced" (default), "vibrant", or "muted".

Palettes

`search_palettes`

Search the color-palette catalog by name, tone, temperature, mood, harmony, exact color count and tags. Returns a paginated list.

read-only · idempotent

Parameter	Type	Description
`name`	string	Fuzzy name match.
`tone`	string: light \| dark \| mixed	Overall tone.
`temperature`	string: warm \| cool \| neutral	Color temperature.
`mood`	string	e.g. pastel, muted, earthy, vibrant, monochrome.
`harmony`	string	e.g. analogous, complementary, triadic, monochromatic, split-complementary, tetradic.
`color_count`	integer	Exact number of colors.
`tags`	array	Tag slugs — ALL must match (AND).
`order`	string: newest \| popular \| name	Sort order (default newest).
`per_page`	integer	Results per page (default 24).
`page`	integer	Page number.

`get_palette`

Get one color palette by id: its colors (hex), name/derived title, mood, harmony, temperature and tags.

read-only · idempotent

Code

`minify_code`

Minify or beautify JS, CSS, HTML, SVG, JSON or XML text. Set type=auto to sniff the language. The code is only parsed and re-printed — never executed and never stored.

read-only · idempotent

Parameter	Type	Description
`code` (required)	string	Source code to transform.
`type` (required)	string: js \| css \| html \| svg \| json \| xml \| auto	Source language, or 'auto' to sniff.
`mode`	string: minify \| beautify	Default minify.
`keep_license`	boolean	Preserve /! ... / license comments when minifying.

`detect_code`

Detect the language/format of a code snippet. Static analysis only — the snippet is never executed and never stored.

read-only · idempotent

`convert_code`

Convert code between text formats (e.g. JSON↔YAML, CSS↔SCSS). Pure text transformation: the source is parsed and re-serialized, never executed and never stored. Use list_code_converters for valid from/to ids and per-converter options.

read-only · idempotent

Parameter	Type	Description
`code` (required)	string	Source code to convert.
`from` (required)	string	Source format id (see list_code_converters).
`to` (required)	string	Target format id.
`options`	object	Per-converter options (see optionsSchema in list_code_converters).

`list_code_converters`

List available code converters with their from/to ids and per-converter option schemas.

read-only · idempotent

No parameters.

SVG

`optimize_svg`

Optimize/clean SVG markup (SVGO). Pure markup transformation — nothing is executed or stored. Returns minified SVG plus before/after sizes.

read-only · idempotent

`svg_to_datauri`

Encode an SVG (or fetched image) as a CSS-ready data: URI. Provide either raw svg or a url.

read-only · idempotent · fetches external URLs

Parameter	Type	Description
`svg`	string	Raw SVG markup. Mutually exclusive with url.
`url`	string	Public image URL the server will fetch.
`encoding`	string: utf8 \| base64	Defaults: utf8 for SVG, base64 for raster.
`quotes`	string: single \| double	Quote style for the data URI (default double).

`list_svg_presets`

List the available SVG optimization presets and what each one does.

read-only · idempotent

No parameters.

Dev

`list_scss_mixins`

List the SCSS mixin catalog (id, title, short description), optionally filtered by group or search.

read-only · idempotent

`get_scss_mixin`

Get one SCSS mixin by id: full source, parameters and usage example.

read-only · idempotent

`generate_clamp`

Calculate a fluid CSS clamp() expression for responsive sizing between two viewport widths. Pure calculation — returns a CSS snippet, writes and stores nothing.

read-only · idempotent

Parameter	Type	Description
`min_fs` (required)	number	Minimum size in px.
`max_fs` (required)	number	Maximum size in px.
`min_vw`	number	Viewport width at min_fs (default 320).
`max_vw`	number	Viewport width at max_fs (default 1440).
`unit`	string: px \| rem \| both	Output unit (default rem).
`root`	number	Root font-size in px for rem conversion (default 16).

About

Built and operated by jinero.online — free design tools for fonts, icons, colors and code. The MCP server is a thin wrapper over the same public REST API: one contract, identical behavior.

This repository holds the public documentation and examples for the server. Issues and feature requests for the tools are welcome here.

Source: README.md at commit d0e5fb8

Tools

search_fonts

Search Fonts Tool

Search the free font catalog by name, category, style tags, language coverage, variable/monospace flags and style count. Returns a paginated list of families.

Parametersnamepagesortlangsorderstylecategoryper_pagevariablemonospacestyles_maxstyles_min

recognize_font

Recognize Font Tool

Parameterstop_kimage_urlimage_base64

get_font

Get Font Tool

Get full metadata for one font family by slug: styles, weights, axes, license, subsets and download/CSS URLs.

Parametersslugrequired

get_font_files

Get Font Files Tool

List every font file (weight/italic/format + direct woff2/ttf URL) for a family — handy for building custom @font-face rules.

Parametersslugrequired

get_fonts_css

Get Fonts Css Tool

Generate ready-to-use @font-face CSS for a family spec (Google-Fonts-compatible), e.g. "inter:wght@400,700" or a variable range "inter:[email protected]". Returns CSS text.

Parametersfamilyrequireddisplay

get_font_download_url

Get Font Download Url Tool

Return the direct ZIP download URL for a font family (all styles + a ready fonts.css). Does NOT download — hand the URL to the user or fetch it separately.

Parametersslugrequired

check_contrast

Check Contrast Tool

Check the WCAG contrast ratio between a foreground and background color, with AA/AAA pass/fail for normal and large text.

Parametersbgrequiredfgrequired

get_color_shades

Get Color Shades Tool

Generate tints and shades for a base color (lighter/darker steps) with hex values.

Parametershexrequiredsteplimit

name_color

Name Color Tool

Parametershexrequired

extract_colors

Extract Colors Tool

Parametersmodecountimage_urlimage_base64

search_palettes

Search Palettes Tool

Search the color-palette catalog by name, tone, temperature, mood, harmony, exact color count and tags. Returns a paginated list.

Parametersmoodnamepagetagstoneorderharmonyper_pagecolor_counttemperature

get_palette

Get Palette Tool

Get one color palette by id: its colors (hex), name/derived title, mood, harmony, temperature and tags.

Parametersidrequired

minify_code

Minify Code Tool

Minify or beautify JS, CSS, HTML, SVG, JSON or XML text. Set type=auto to sniff the language. The code is only parsed and re-printed — never executed and never stored. Rate limit: 30 calls/min per IP.

Parameterscoderequiredmodetyperequiredkeep_license

detect_code

Detect Code Tool

Detect the language/format of a code snippet. Static analysis only — the snippet is never executed and never stored.

Parameterscoderequired

convert_code

Convert Code Tool

Parameterstorequiredcoderequiredfromrequiredoptions

list_code_converters

List Code Converters Tool

List available code converters with their from/to ids and per-converter option schemas.

Takes no parameters.

optimize_svg

Optimize Svg Tool

Optimize/clean SVG markup (SVGO). Pure markup transformation — nothing is executed or stored. Returns minified SVG plus before/after sizes. Rate limit: 30 calls/min per IP.

Parameterssvgrequiredpreset

svg_to_datauri

Svg To Data Uri Tool

Encode an SVG (or fetched image) as a CSS-ready data: URI. Provide either raw svg or a url. Rate limit: 30 calls/min per IP.

Parameterssvgurlquotesencoding

list_svg_presets

List Svg Presets Tool

List the available SVG optimization presets and what each one does.

Takes no parameters.

list_scss_mixins

List Scss Mixins Tool

List the SCSS mixin catalog (id, title, short description), optionally filtered by group or search.

Parametersgroupfieldssearch

get_scss_mixin

Get Scss Mixin Tool

Get one SCSS mixin by id: full source, parameters and usage example.

Parametersidrequired

generate_clamp

Generate Clamp Tool

Calculate a fluid CSS clamp() expression for responsive sizing between two viewport widths. Pure calculation — returns a CSS snippet, writes and stores nothing.

Parametersrootunitmax_fsrequiredmax_vwmin_fsrequiredmin_vw

Version history

v1.4.0LatestSep 16, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

Reached in the last 30 daysRequired25 pts
Auth declaredRequired10 pts
Tools listedRequired15 pts
DescriptionRequired15 pts
Logo10 pts
Documentation15 pts
License10 pts

Parameter	Type	Description
`hex` (required)	string	Base color in hex, rgb(), or hsl().
`step`	string: 5 \| 10 \| 20 \| 25	Step percentage (default 10).
`limit`	integer	Cap on tints/shades (default fills to ~100%).

Parameter	Type	Description
`svg` (required)	string	SVG source. Max 500,000 chars.
`preset`	string: safe \| balanced \| aggressive	Optimization preset (default balanced).

Parameter	Type	Description
`group`	string	e.g. Bootstrap, Project, Pattern, Placeholder.
`search`	string	Fuzzy substring across id/title/short/desc.
`fields`	string: summary \| full	Detail level (default summary).